Time-controlled trip mechanism for fireless cookers.



C. BARGAMIN.

TIME CONTROLLED TRIP MECHANISM FOR FIRELESS COOKERS.

APPLlCATlON HLED APR. 19, I915.

Patented June 12, 1917.

2 SHEETS-SHEET I.

attomq E. BARGAMIN.

TIME CONTROLLED TRIP MECHANISM FOR FIRELESS COOKERS.

APPLLCATION FILED APR-19, 191-6.

Patentd J 11112 12, 1917.

2 SHEETS-SHEET 2.

6. i mfilzffordfiaryamiw .as herein described, illustrated and UNITED STATES PATENT OFFICE.

cmrronn BARG'AMIN, or NEWPORT NEWS, v BGINIA.

TIME-CONTROLLED TRIP MECHANISM FOR FIRELI ESS CObKERS.

the time-controlled tripping means used in connection with fireless cookers, the mechanism of this invention embodying in connection with a main controlling member, a latch for holding and releasing said member, clock mechanism, a disk having a fixed relation to a rotary arbor of said clock mechanism, a trip member carried by said disk, and means carried by the latch and arranged in the sweep of said tripping mem her on the disk, whereby after a predetermined partial rotary movement of said disk, the said latch is automatically withdrawn from its engagement with the controlling member and the latter released for the purpose of cutting off the fuel supply and sealing the cooking compartment.

With the above and other objects in view, the invention consists in the novel construc tion, combination and arrangement of arts, claimed. In the accompanying drawings Figure 1 is a perspective view of a fireless cooker showing the relation of the timing mechanism of this invention thereto.

Fig. 2 is a side elevation of the same partly in section.

Fig. .3 is a fragmentary vertical cross section showing the means for closing the bottom heat intake orifice.

Referring to the drawings 1 designates the. outer casing of a fireless cooker containing a cooking compartment or oven shown at A closed by means of a door 2, said cooking compartment or oven being formed in the bottom wall thereof with a heat inlet orifice under which a preheater is arranged, the heat in the orifice being controlled by a slidable. closure 5 having connected therewith an operating plunger 3 which is slidable in a tubular guide 4 extending from one side of the casing as shown in Fig. 1.

The heating compartment is formed in the upper side thereof with a vent5 which is adapted to be closed by means of a vent Specification of Letters Patent.

Application filed April 19, 1916. Serial No. 92,176.

plug 6 the stem 7 of which is connected to one arm of a lever 8 pivoted on a fulcrum post 9-on top. of the casing 1 and provided at the extremity of the other arm with an eye 10 in which is slidingly received the upper end portion of a connecting rod 11.

The lower end of the rod .11 is connected bv a pin 12, which may form a pivot, with the extremity of one arm 13 of a trip lever which is fulcrumed about centrally of its length on the tubular guide 4 above referred to. The other arm 14 of said lever is connected by a pin or pivot 15 to the lower extremity of a setting and actuating member 16 shown in the form of a vertically extending rod which is slidable through a fixed guide 17. The membe'r 16 is shown as provided at its upper extremity with an operating knob 18 while a lever depressing spring 19 encircles the member 16 between the guide 17 and the adjacent extremity of the trip lever, said spring acting to depress the lever 14. Adjustably mounted on the member 16 is a shoulder20 shown in the form of a collar held in fixed relation to the member 16 when properly adjusted by means of a set screw 21. The connecting rod 11 has an adjustable collar 22 thereon held in place when adjusted by means of a set screw 23, and a coiled expansion compensating spring 24 is interposed between .the collar 22 and the eye 10 of the plug operating lever 8. The arm 13 of the trip lever is provided with a laterally extending lip 25 which is adapted to strike against the operating arm 26 of a cut-01f valve 27 which controls the gas supply pipe 28 leading to the preheater under the cooking com artment.

29 designates the casing o the clock mechanism mounted on the side wall of the casing 1 between the members 11 and 16. Fast on a rotary arbor 30 of the clock mechanism, said arbor preferably being the winding arbor, is a disk 31 having a tripping member 32 projecting from one face thereof and shown as consisting of a'pin. The pin 32, during the rotative movement of the disk 31,-is adapted'to come in contact with the head 33 of a latch 34 which is movable into and out of engagement with the shoulder 20 of the member 16 for the purpose of upholding said member against the tension of the spring 19, and releasing said controlling member at a predetermined time. The latch 34 is connected to the head 33 by a stem 35 surrounded by a latch thrust spring 36 contained Within a tubular guide 37 arranged internally of the casing 29.

A hand or pointer 38 also has a fixed relation to the arbor and is arranged to sweep over a stationary dial 39 which is graduated as indicated in the drawings.

From the foregoing description, taken in connection with the accompanying drawings, the operation of the mechanism above described will now be understood. The hand 38 is primarily set, for example, at the twenty minute graduation of the dial 39, thus requiring twenty minutes-for the point of the hand to return to zero. By mounting the hand 38 on the winding arbor of the clock mechanism, said mechanismis wound as the hand 38 is turned away from zero and upon releasing said hand, the clock mechanism starts in operation. After setting the hand 38, the knob 18 is grasped and the member 16 moved upwardly until the shoulder 20 snaps past the extremity of the latch 34. The operating arm 26 of the cut-off valve 27 is then moved to a substantially horizontal position as shown Where it overlies and rests in the path of the lip 25 of the trip lever. The movement of the" trip lever, through the medium of the connecting rod 11, opens the vent plug 6. The operative position of the parts during the burning of the preheater is shown in Figs. 1 and 2 of the draw,- ings. \Vhen the predetermined period of time has expired and the indicating hand 38 has returned to zero, the pin 32 has acted upon the head 33 of the latch 34 and just as the zero point is reached, the latch 34 is spring 24 allowing for any excessive move? ment of the connecting rod 11 and IIISIIIlIIg' the tight fitting of the vent plug 6.

I claim:

In time controlled trip mechanism, a casing, a slidable, spring thrust, setting and actuating member, a slidable latch within said casing but movable through an opening in one wall thereof to hold and release said actuating member, said latch having a lateral projection at one end, clock mechanism within said casing including a dial, a disk within said casing fast on a rotary arbor of the clock -mechanism and disposed in a plane parallel to the path of movement of said latch, and a post on said disk adapted to strike against the head of the latch to slide the latter out of holding engagement with.

said setting and actuating member.

In testimony whereof I affix my slgnature in presence of two witnesses.

CLIFFORD BARGAMIN.

Witnesses Come G. JOHNSTON, H. G. WILLIAMS. 

